oooh this is a very good question!! honestly i think it might be the peacefulness. like i have adhd usually my head is never peaceful it’s always buzzing and loud and busy But when i do yoga it quiets and when i run it doesn’t just quiet it completely empties. it’s such a weird state to be in because while im running i know that im thinking of things but then when over two hours have passed and i’ve finished my run i can’t even remember a single thought i had in that time. i recently listened to the audiobook of murakami “what i talk about when i talk about running” and i felt really seen and understood because he explains a similar feeling. it’s such an intensely physical state and it can often push you to your limits both physical and mental but then afterwards, when your whole body aches and Not running feels unnatural, my head feels so peaceful. and it honestly genuinely makes me happy. the way that it has changed my body and made me more fit also helps of course 🙂‍↕️